基于文献计量分析的场地化学氧化修复技术研究热点和趋势

化学氧化修复技术具有污染物去除效率高、修复周期短和成本低等优势，在污染场地修复领域具有广阔的应用前景。基于Web of Science数据库，通过文献计量可视化软件VOSviewer和CiteSpace，分析了1990—2022年场地污染土壤和地下水化学氧化修复领域的研究热点及趋势。结果表明，1990—2022年年度发文量呈增长趋势，中国和美国是发文量排名前二的国家，2010年后中国年发文量快速增加并位居第一，中国科学院在发文量及被引频次方面均高居榜首。
基于关键词分析，总结归纳了化学氧化修复技术适用污染物类型、氧化剂种类和催化/活化方法以及化学氧化联合修复技术。当前研究热点集中在催化/活化方法研发、污染物降解机理探究以及在土壤和地下水中修复应用等方面；未来研究重点将聚焦于研发新型氧化剂和靶向催化/活化材料，探究材料迁移扩散机制和活性氧化物质产生机理，发展协同化学氧化修复技术体系并推进工程化应用，以及建立化学氧化修复全过程风险监测和评价体系。

Research focus and future trends of chemical oxidation technology for site remediation based on bibliometric analysis

Chemical oxidation is a green and low-carbon remediation technology that has wide application prospects in the field of contaminated site remediation, mainly due to its high efficiency, short remediation time and low cost. In order to systematically sort out the knowledge structure and research thread of chemical oxidation, and to explore the hotspots and trends of the research, the bibliometric method was used to visualize and analyze the number of published articles, institutions and keywords in the core database of Web of Science from 1990 to 2022 by using VOSviewer and CiteSpace knowledge map analysis tool. The results showed that the number of annual publications was increasing worldwide. The country with the highest total number of publications was China, followed by USA. The number of annual publications of China ranked the first since 2010.
The Chinese Academy of Sciences topped the list in terms of the number of publications and the frequency of citations. Based on keyword analysis, pollutants suitable for chemical oxidation remediation technology, oxidants species, catalytic/activation methods and combined chemical oxidation remediation technology were summarized. The research hotspots focused on development of catalytic/activation method, investigation of pollutant degradation mechanism, and application in soil and groundwater remediation. Meanwhile, future research is expected to concentrate on the development of novel oxidant species and targeted activation/catalytic methods, the investigation of mechanism of materials migration and diffusion and reactive oxidizing substances generation, construction of synergistic chemical oxidation remediation technology system and promotion of engineering application. In addition, establishment of risk monitoring and evaluation system for the entire chemical oxidation remediation process also deserves attention.